He doesn’t want martyrs. What he does want is the pretence of an internal threat to good public order. It helps buttress his authority. All tyrants have needed that from time to time. All he has to do is tell the people that there’s a secret society operating whose published manifesto may be beguilingly liberal but whose real aim is to close down the Isle of Man Colony, let loose ten thousand criminal psychopaths on an ageing society, send home all the Sojourners so that the rubbish isn’t collected and the streets are unswept, and ultimately overthrow the Council and the Warden himself.